Copyright c 2014 for the individual papers by the papers' authors. Copying permitted only for private and academic purposes. Republication of material from this volume requires permission by the copyright owners. This volume contains the papers presented at IIR'14: 5th Italian Information Retrieval Workshop held on January 20-21, 2014 in Roma, Italy. The purpose of the Italian Information Retrieval (IIR) workshop series is to provide a forum for stimulating and disseminating research in information retrieval, where Italian researchers (especially young ones) and researchers a liated with Italian institutions can network and discuss their research results in an informal way. Previously IIR took place in Pisa (2013), Bari (2012), Milan (2011) and Padua (2010).
The contributions to IIR 2014 mainly address ve relevant topics: { theory { classi cation and recommendation { semantics { social media and information retrieval { natural language and applications We received 18 submissions, both full and short original papers presenting new research results. Each submission was reviewed by at least two, and on the average 2.9, program committee members. The reviewers looked at originality, technical depth, style of presentation, and impact. Finally, the committee decided to accept 12 papers for presentation at the workshop, 11 of which are presented in these proceedings.
The program also included two special events. The rst was an invited talk, given by Antonio Gull , from Microsoft. The talk was titled \Integrating Search Suggestions and Entities". The second event was a panel on \Information and Knowledge Retrieval in the age of Social Media". Participants to the panel were: Renato Soru from Tiscali, Loredana Grimaldi from Telecom Italia, Andrea Basso from Sisvel Technology and Davide Bennato from the Fondazione Luigi Einaudi and the University of Catania. Both events were very highly praised by the participants.
We acknowledge the support of Telecom Italia, Tiscali, eBay, and the University of Tor Vergata
Roberto Basili (General Chair), University of Roma Tor Vergata, Italy Fabio Crestani (Program co-Chair), University of Lugano (USI), Switzerland Marco Pennacchiotti (Program co-Chair), eBay Inc., USA Evaluation of a Recursive Weighting Scheme for Federated Web Search : :
Emanuele Di Buccio, Ivano Masiero and Massimo Melucci The Axiometrics Project : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :
Eddy Maddalena and Stefano Mizzaro Session 2: Classi cation and Recommendation Can We Infer Book Classi cation by Blurbs? : : : : : : : : : : : : : : : : : : : : : : : : :
Valentina Poggioni, Valentina Franzoni and Fabiana Zollo Top-N Recommendations from Implicit Feedback leveraging Linked Open Data : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Vito Claudio Ostuni, Tommaso Di Noia, Roberto Mirizzi and Eugenio Di Sciascio
Detection of Similar Terrorist Events : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :
Vittoria Cozza and Michelangelo Rubino Developing a Semantic Content Analyzer for LAquila Social Urban Network : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Cataldo Musto, Giovanni Semeraro, Pasquale Lops, Marco de Gemmis, Fedelucio Narducci, Luciana Bordoni, Mauro Annunziato, Claudia Meloni, Franco F. Orsucci and Giulia Paoloni Session 4: Natural Language Processing Sentiment Estimation on Twitter : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :
Giambattista Amati, Marco Bianchi and Giuseppe Marcone Enabling Enterprise Semantic Search through Language Technologies: the ProgressIt experience : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Roberto Basili, Andrea Ciapetti, Danilo Croce, Valeria Marino, Paolo Salvatore and Valerio Storch Exploiting Wikipedia to Identify Domain-Speci c Key Terms/Phrases from a Short-Text Collection : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Muhammad Atif Qureshi, Colm O'Riordan and Gabriella Pasi iv 1 11 16 20 28 34 39 51 63
LearNext: Learning to Predict Tourists Movements : : : : : : : : : : : : : : : : : : : : 75 Ranieri Baraglia, Cristina Ioana Muntean, Franco Maria Nardini and Fabrizio Silvestri An Investigation into the Correlation between Willingness for Web Search Personalization and SNS Usage Patterns : : : : : : : : : : : : : : : : : : : : : : : 80
Giuseppe Amodeo Pierpaolo Basile Roberto Basili Giacomo Berardi Gloria Bordogna Claudio Carpineto Fabio Crestani Marco De Gemmis Giorgio Maria Di Nunzio Antonio Gulli Monica Landoni Pasquale Lops Marco Maggini Massimo Melucci Alberto Messina
Alessandro Moschitti Roberto Navigli Salvatore Orlando Gabriella Pasi Marco Pennacchiotti Ra aele Perego Francesco Ricci Fabrizio Sebastiani Giovanni Semeraro Fabrizio Silvestri Fabio Massimo Zanzotto
Fondazione Ugo Bordoni, Roma, Italy Univertsity of Bari, Italy University Tor Vergata, Roma, Italy ISTI-CNR, Pisa, Italy IDPA-CNR, Dalmine, Italy Fondazione Ugo Bordoni, Roma, Italy University of Lugano (USI), Lugano, Switzerland University of Bari, Italy University of Padua, Italy Microsoft, London, UK University of Lugano (USI), Lugano, Switzerland University of Bari, Italy University of Siena, Italy University of Padua, Italy Radiotelevisione Italiana (RAI), Centre for Research and Technological Innovation, Rome, Italy University of Udine, Italy University of Trento, Italy University Sapienza, Roma, Italy University Ca' Foscari, Venezia, Italy University Milano-Bicocca, Milano, Italy eBay, USA ISTI-CNR, Pisa, Italy Free University of Bozen, Bolzano, Italy ISTI-CNR, Pisa, Italy University of Bari, Italy Yahoo! Barcelona, Spain University Tor Vergata, Roma, Italy